Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __NET_ACT_API_H |
3 | #define __NET_ACT_API_H | |
4 | ||
5 | /* | |
0b0f43fe JHS |
6 | * Public action API for classifiers/qdiscs |
7 | */ | |
1da177e4 | 8 | |
036bb443 | 9 | #include <linux/refcount.h> |
1da177e4 LT |
10 | #include <net/sch_generic.h> |
11 | #include <net/pkt_sched.h> | |
ddf97ccd WC |
12 | #include <net/net_namespace.h> |
13 | #include <net/netns/generic.h> | |
1da177e4 | 14 | |
65a206c0 | 15 | struct tcf_idrinfo { |
95278dda | 16 | struct mutex lock; |
65a206c0 | 17 | struct idr action_idr; |
981471bd | 18 | struct net *net; |
a85a970a WC |
19 | }; |
20 | ||
21 | struct tc_action_ops; | |
22 | ||
23 | struct tc_action { | |
24 | const struct tc_action_ops *ops; | |
ec0595cc | 25 | __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ |
65a206c0 | 26 | struct tcf_idrinfo *idrinfo; |
a85a970a | 27 | |
ec0595cc | 28 | u32 tcfa_index; |
036bb443 VB |
29 | refcount_t tcfa_refcnt; |
30 | atomic_t tcfa_bindcnt; | |
ec0595cc WC |
31 | int tcfa_action; |
32 | struct tcf_t tcfa_tm; | |
50dc9a85 AD |
33 | struct gnet_stats_basic_sync tcfa_bstats; |
34 | struct gnet_stats_basic_sync tcfa_bstats_hw; | |
ec0595cc | 35 | struct gnet_stats_queue tcfa_qstats; |
1c0d32fd | 36 | struct net_rate_estimator __rcu *tcfa_rate_est; |
ec0595cc | 37 | spinlock_t tcfa_lock; |
50dc9a85 AD |
38 | struct gnet_stats_basic_sync __percpu *cpu_bstats; |
39 | struct gnet_stats_basic_sync __percpu *cpu_bstats_hw; | |
519c818e | 40 | struct gnet_stats_queue __percpu *cpu_qstats; |
eec94fdb | 41 | struct tc_cookie __rcu *act_cookie; |
ee3bbfe8 | 42 | struct tcf_chain __rcu *goto_chain; |
e3822678 | 43 | u32 tcfa_flags; |
0dfb2d82 | 44 | u8 hw_stats; |
93a129eb JP |
45 | u8 used_hw_stats; |
46 | bool used_hw_stats_valid; | |
e9ce1cd3 | 47 | }; |
ec0595cc WC |
48 | #define tcf_index common.tcfa_index |
49 | #define tcf_refcnt common.tcfa_refcnt | |
50 | #define tcf_bindcnt common.tcfa_bindcnt | |
ec0595cc WC |
51 | #define tcf_action common.tcfa_action |
52 | #define tcf_tm common.tcfa_tm | |
53 | #define tcf_bstats common.tcfa_bstats | |
54 | #define tcf_qstats common.tcfa_qstats | |
55 | #define tcf_rate_est common.tcfa_rate_est | |
56 | #define tcf_lock common.tcfa_lock | |
e9ce1cd3 | 57 | |
0dfb2d82 JK |
58 | #define TCA_ACT_HW_STATS_ANY (TCA_ACT_HW_STATS_IMMEDIATE | \ |
59 | TCA_ACT_HW_STATS_DELAYED) | |
44f86580 | 60 | |
695176bf CW |
61 | /* Reserve 16 bits for user-space. See TCA_ACT_FLAGS_NO_PERCPU_STATS. */ |
62 | #define TCA_ACT_FLAGS_USER_BITS 16 | |
63 | #define TCA_ACT_FLAGS_USER_MASK 0xffff | |
64 | #define TCA_ACT_FLAGS_POLICE (1U << TCA_ACT_FLAGS_USER_BITS) | |
65 | #define TCA_ACT_FLAGS_BIND (1U << (TCA_ACT_FLAGS_USER_BITS + 1)) | |
66 | #define TCA_ACT_FLAGS_REPLACE (1U << (TCA_ACT_FLAGS_USER_BITS + 2)) | |
67 | #define TCA_ACT_FLAGS_NO_RTNL (1U << (TCA_ACT_FLAGS_USER_BITS + 3)) | |
68 | ||
56e5d1ca ED |
69 | /* Update lastuse only if needed, to avoid dirtying a cache line. |
70 | * We use a temp variable to avoid fetching jiffies twice. | |
71 | */ | |
72 | static inline void tcf_lastuse_update(struct tcf_t *tm) | |
73 | { | |
74 | unsigned long now = jiffies; | |
75 | ||
76 | if (tm->lastuse != now) | |
77 | tm->lastuse = now; | |
53eb440f JHS |
78 | if (unlikely(!tm->firstuse)) |
79 | tm->firstuse = now; | |
56e5d1ca ED |
80 | } |
81 | ||
48d8ee16 JHS |
82 | static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm) |
83 | { | |
84 | dtm->install = jiffies_to_clock_t(jiffies - stm->install); | |
85 | dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse); | |
b15e6263 RM |
86 | dtm->firstuse = stm->firstuse ? |
87 | jiffies_to_clock_t(jiffies - stm->firstuse) : 0; | |
48d8ee16 JHS |
88 | dtm->expires = jiffies_to_clock_t(stm->expires); |
89 | } | |
90 | ||
00175aec AV |
91 | #ifdef CONFIG_NET_CLS_ACT |
92 | ||
93 | #define ACT_P_CREATED 1 | |
94 | #define ACT_P_DELETED 1 | |
95 | ||
4a5da47d VB |
96 | typedef void (*tc_action_priv_destructor)(void *priv); |
97 | ||
e9ce1cd3 | 98 | struct tc_action_ops { |
1f747c26 | 99 | struct list_head head; |
1da177e4 | 100 | char kind[IFNAMSIZ]; |
eddd2cf1 | 101 | enum tca_id id; /* identifier should match kind */ |
a85a970a | 102 | size_t size; |
1da177e4 | 103 | struct module *owner; |
0b0f43fe | 104 | int (*act)(struct sk_buff *, const struct tc_action *, |
7fd4b288 | 105 | struct tcf_result *); /* called under RCU BH lock*/ |
e9ce1cd3 | 106 | int (*dump)(struct sk_buff *, struct tc_action *, int, int); |
9a63b255 | 107 | void (*cleanup)(struct tc_action *); |
f061b48c | 108 | int (*lookup)(struct net *net, struct tc_action **a, u32 index); |
c1b52739 | 109 | int (*init)(struct net *net, struct nlattr *nla, |
695176bf CW |
110 | struct nlattr *est, struct tc_action **act, |
111 | struct tcf_proto *tp, | |
abbb0d33 | 112 | u32 flags, struct netlink_ext_ack *extack); |
ddf97ccd | 113 | int (*walk)(struct net *, struct sk_buff *, |
1af85155 | 114 | struct netlink_callback *, int, |
41780105 AA |
115 | const struct tc_action_ops *, |
116 | struct netlink_ext_ack *); | |
4b61d3e8 | 117 | void (*stats_update)(struct tc_action *, u64, u64, u64, u64, bool); |
a03b91b1 | 118 | size_t (*get_fill_size)(const struct tc_action *act); |
470d5060 VB |
119 | struct net_device *(*get_dev)(const struct tc_action *a, |
120 | tc_action_priv_destructor *destructor); | |
4a5da47d VB |
121 | struct psample_group * |
122 | (*get_psample_group)(const struct tc_action *a, | |
123 | tc_action_priv_destructor *destructor); | |
ddf97ccd WC |
124 | }; |
125 | ||
126 | struct tc_action_net { | |
65a206c0 | 127 | struct tcf_idrinfo *idrinfo; |
ddf97ccd | 128 | const struct tc_action_ops *ops; |
1da177e4 LT |
129 | }; |
130 | ||
ddf97ccd | 131 | static inline |
981471bd | 132 | int tc_action_net_init(struct net *net, struct tc_action_net *tn, |
c7e460ce | 133 | const struct tc_action_ops *ops) |
ddf97ccd WC |
134 | { |
135 | int err = 0; | |
136 | ||
65a206c0 CM |
137 | tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL); |
138 | if (!tn->idrinfo) | |
ddf97ccd WC |
139 | return -ENOMEM; |
140 | tn->ops = ops; | |
981471bd | 141 | tn->idrinfo->net = net; |
95278dda | 142 | mutex_init(&tn->idrinfo->lock); |
65a206c0 | 143 | idr_init(&tn->idrinfo->action_idr); |
ddf97ccd WC |
144 | return err; |
145 | } | |
146 | ||
65a206c0 CM |
147 | void tcf_idrinfo_destroy(const struct tc_action_ops *ops, |
148 | struct tcf_idrinfo *idrinfo); | |
ddf97ccd | 149 | |
039af9c6 CW |
150 | static inline void tc_action_net_exit(struct list_head *net_list, |
151 | unsigned int id) | |
ddf97ccd | 152 | { |
039af9c6 CW |
153 | struct net *net; |
154 | ||
a159d3c4 | 155 | rtnl_lock(); |
039af9c6 CW |
156 | list_for_each_entry(net, net_list, exit_list) { |
157 | struct tc_action_net *tn = net_generic(net, id); | |
158 | ||
159 | tcf_idrinfo_destroy(tn->ops, tn->idrinfo); | |
160 | kfree(tn->idrinfo); | |
161 | } | |
a159d3c4 | 162 | rtnl_unlock(); |
ddf97ccd WC |
163 | } |
164 | ||
165 | int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, | |
166 | struct netlink_callback *cb, int type, | |
b3620145 AA |
167 | const struct tc_action_ops *ops, |
168 | struct netlink_ext_ack *extack); | |
65a206c0 | 169 | int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index); |
65a206c0 CM |
170 | int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est, |
171 | struct tc_action **a, const struct tc_action_ops *ops, | |
e3822678 VB |
172 | int bind, bool cpustats, u32 flags); |
173 | int tcf_idr_create_from_flags(struct tc_action_net *tn, u32 index, | |
174 | struct nlattr *est, struct tc_action **a, | |
175 | const struct tc_action_ops *ops, int bind, | |
176 | u32 flags); | |
396d7f23 | 177 | void tcf_idr_insert_many(struct tc_action *actions[]); |
0190c1d4 VB |
178 | void tcf_idr_cleanup(struct tc_action_net *tn, u32 index); |
179 | int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index, | |
180 | struct tc_action **a, int bind); | |
b3650bf7 | 181 | int tcf_idr_release(struct tc_action *a, bool bind); |
28e6b67f | 182 | |
ddf97ccd | 183 | int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops); |
0b0f43fe JHS |
184 | int tcf_unregister_action(struct tc_action_ops *a, |
185 | struct pernet_operations *ops); | |
90b73b77 | 186 | int tcf_action_destroy(struct tc_action *actions[], int bind); |
22dc13c8 WC |
187 | int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions, |
188 | int nr_actions, struct tcf_result *res); | |
9fb9f251 | 189 | int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla, |
695176bf | 190 | struct nlattr *est, |
87c750e8 | 191 | struct tc_action *actions[], int init_res[], size_t *attr_size, |
695176bf CW |
192 | u32 flags, struct netlink_ext_ack *extack); |
193 | struct tc_action_ops *tc_action_load_ops(struct nlattr *nla, bool police, | |
d349f997 CW |
194 | bool rtnl_held, |
195 | struct netlink_ext_ack *extack); | |
9fb9f251 JP |
196 | struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, |
197 | struct nlattr *nla, struct nlattr *est, | |
87c750e8 | 198 | struct tc_action_ops *a_o, int *init_res, |
695176bf | 199 | u32 flags, struct netlink_ext_ack *extack); |
90b73b77 | 200 | int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind, |
ca44b738 | 201 | int ref, bool terse); |
5c15257f JP |
202 | int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); |
203 | int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int); | |
5e1ad95b VB |
204 | |
205 | static inline void tcf_action_update_bstats(struct tc_action *a, | |
206 | struct sk_buff *skb) | |
207 | { | |
5e174d5e | 208 | if (likely(a->cpu_bstats)) { |
50dc9a85 | 209 | bstats_update(this_cpu_ptr(a->cpu_bstats), skb); |
5e174d5e VB |
210 | return; |
211 | } | |
212 | spin_lock(&a->tcfa_lock); | |
213 | bstats_update(&a->tcfa_bstats, skb); | |
214 | spin_unlock(&a->tcfa_lock); | |
26b537a8 VB |
215 | } |
216 | ||
217 | static inline void tcf_action_inc_drop_qstats(struct tc_action *a) | |
218 | { | |
5e174d5e VB |
219 | if (likely(a->cpu_qstats)) { |
220 | qstats_drop_inc(this_cpu_ptr(a->cpu_qstats)); | |
221 | return; | |
222 | } | |
223 | spin_lock(&a->tcfa_lock); | |
224 | qstats_drop_inc(&a->tcfa_qstats); | |
225 | spin_unlock(&a->tcfa_lock); | |
26b537a8 VB |
226 | } |
227 | ||
228 | static inline void tcf_action_inc_overlimit_qstats(struct tc_action *a) | |
229 | { | |
5e174d5e VB |
230 | if (likely(a->cpu_qstats)) { |
231 | qstats_overlimit_inc(this_cpu_ptr(a->cpu_qstats)); | |
232 | return; | |
233 | } | |
234 | spin_lock(&a->tcfa_lock); | |
235 | qstats_overlimit_inc(&a->tcfa_qstats); | |
236 | spin_unlock(&a->tcfa_lock); | |
26b537a8 VB |
237 | } |
238 | ||
4b61d3e8 PL |
239 | void tcf_action_update_stats(struct tc_action *a, u64 bytes, u64 packets, |
240 | u64 drops, bool hw); | |
5c15257f | 241 | int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); |
00175aec | 242 | |
85d0966f DC |
243 | int tcf_action_check_ctrlact(int action, struct tcf_proto *tp, |
244 | struct tcf_chain **handle, | |
245 | struct netlink_ext_ack *newchain); | |
246 | struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action, | |
247 | struct tcf_chain *newchain); | |
c129412f | 248 | |
249 | #ifdef CONFIG_INET | |
250 | DECLARE_STATIC_KEY_FALSE(tcf_frag_xmit_count); | |
251 | #endif | |
252 | ||
253 | int tcf_dev_queue_xmit(struct sk_buff *skb, int (*xmit)(struct sk_buff *skb)); | |
2734437e | 254 | #endif /* CONFIG_NET_CLS_ACT */ |
86cb13e4 | 255 | |
38040702 | 256 | static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, |
4b61d3e8 PL |
257 | u64 packets, u64 drops, |
258 | u64 lastuse, bool hw) | |
38040702 | 259 | { |
2734437e | 260 | #ifdef CONFIG_NET_CLS_ACT |
38040702 AV |
261 | if (!a->ops->stats_update) |
262 | return; | |
263 | ||
4b61d3e8 | 264 | a->ops->stats_update(a, bytes, packets, drops, lastuse, hw); |
2734437e | 265 | #endif |
38040702 AV |
266 | } |
267 | ||
b3f55bdd | 268 | |
1da177e4 | 269 | #endif |